A Chorus Line in the context of Lighting designer

Musical theatre is a form of theatrical performance that combines songs, spoken dialogue, acting and dance. The story and emotional content of a musical – humor, pathos, love, anger – are communicated through words, music, movement and technical aspects of the entertainment as an integrated whole. Although musical theatre overlaps with other theatrical forms like opera and dance, it may be distinguished by the equal importance given to the music as compared with the dialogue, movement and other elements. Since the early 20th century, musical theatre stage works have generally been called, simply, musicals.

Although music has been a part of dramatic presentations since ancient times, modern Western musical theatre emerged during the 19th century, with many structural elements established by the light opera works of Jacques Offenbach in France, Gilbert and Sullivan in Britain and the works of Harrigan and Hart in America. These were followed by Edwardian musical comedies, which emerged in Britain, and the musical theatre works of American creators like George M. Cohan at the turn of the 20th century. The Princess Theatre musicals (1915–1918) were artistic steps forward beyond the revues and other frothy entertainments of the early 20th century and led to such groundbreaking works as Show Boat (1927), Of Thee I Sing (1931) and Oklahoma! (1943). Some of the best-known musicals through the decades that followed includeMy Fair Lady (1956), The Fantasticks (1960), Hair (1967), A Chorus Line (1975), Les Misérables (1985), The Phantom of the Opera (1986), Rent (1996), Wicked (2003) and Hamilton (2015).

Tharon Myrene Musser (January 8, 1925 – April 19, 2009) was an American lighting designer who worked on more than 150 Broadway productions. She was termed the "Dean of American Lighting Designers" and is considered one of the pioneers in her field.

Musser was best known for her work on the musicals A Chorus Line and Dreamgirls. A Chorus Line was the first production of Broadway to use a fully computerized lighting console instead of manually operated "piano boards".

Michael Bennett (April 8, 1943 – July 2, 1987) was an American musical theatre director, writer, choreographer, and dancer. He won seven Tony Awards for his choreography and direction of Broadway shows and was nominated for an additional eleven.

Bennett choreographed Promises, Promises; Follies; and Company. In 1976, he won the Tony Award for Best Direction of a Musical and the Tony Award for Best Choreography for the musical A Chorus Line. Bennett, under the aegis of producer Joseph Papp, created A Chorus Line based on a workshop process which he pioneered. He also directed and co-choreographed Dreamgirls with Michael Peters.

Edward "Ed" Kleban (April 30, 1939 – December 28, 1987) was an American musical theatre composer and lyricist. Kleban was born in the Bronx, New York City, in 1939 and graduated from New York's High School of Music & Art and Columbia University, where he attended with future playwright Terrence McNally.

Kleban is best known as lyricist of the Broadway hit A Chorus Line. He and composer Marvin Hamlisch won the 1976 Tony Award for Best Original Score, and he shared the Pulitzer Prize for Drama in 1976 with Hamlisch and three other contributors to the musical. The one-woman Phyllis Newman show, The Madwoman of Central Park West (1979), featured a few tunes with his lyrics.

James Kirkwood Jr. (August 22, 1924 – April 21, 1989) was an American playwright, author and actor. In 1976 he received the Tony Award, the Drama Desk Award for Outstanding Book of a Musical, and the Pulitzer Prize for Drama for the Broadway hit A Chorus Line.

Nicholas Dante (November 22, 1941 – May 21, 1991) was an American dancer and writer, best known for having co-written the book of the musical A Chorus Line. He was the first Latino to win a Pulitzer Prize for Drama.

Wayne Louis Cilento (born August 28, 1949) is an American director, choreographer, actor and dancer. He is best known for originating the role of Mike in the Broadway show A Chorus Line, and later becoming one of Broadway's most prolific choreographers.